The VOIDRUNNER'S CODEX is LIVE! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
And any similarities to Gamera are surely coincidental:
Just because they're both basically giant snapping turtle kaiju who can fly through space by spinning around in their shells, that's no reason to assume one was based on the other....